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Letters .Patent No. 73,927, dated January 28, 1868.

IMPROVE!) METALLIC BAND POB. TRIMMING (.lAE--SILATSI 'ilg Sagitta aterrait in ligar Wetters hneln ma mating rari ai tigel azure.

,TO ALL WHOM IT MAY CON CERN:

Beit known that I, D. F. RANDALL, of Chicopee, in the county of Hampden,and Commonwealth of Massachusetts, `have invented a new and improvedMetallic Band for Trimming the Edges of the Backs of Car-Seats, andother like upholstering purposes; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the annexed drawings, making a part of this specification,and to the letters of reference marked thereon, in whichi Figure is areverse plan of said band.

Figure 2 is a transverse section of the same.

Figure 3 is an end elevation of the set of drawing-rolls by means ofwhich I construct the band of the form shown. i

Figure 4 is a transverse vertical section through line K L, g. 3; and

Figure 5 is a transverse section of the bar of cast metal, which isdrawn through the space between the dies upon the faces of the tworolls.

To obviate the objections to the use of wooden bands or strips upon theledges of the backs of carseats, and concealing the ends of the plush orcloth covering, metallic bands have been used; and my invention relatesto the construction Iof said bauds, of such a conformation that thelower edges of the band will be embedded tightly in the cloth coveringof the back, and any slight inequalities in the line of the lower edgeof the band will not be visible, or leave a space between the band andthe cloth.

In order to make these bands perfect in outline throughout their lengthas to the curves and angles, and

' to obtain a smooth, polished surface, free from seams andimperfections, and at the same time to reduce the cost of manufacturingsaid bands, so as to make them an available substitute for thebandsheretofore used, I construct said bands by drawing a bar of theproper material between adjustable rolls or dies, which are constructedand arranged as hereinafter described, instead of shaping them by hand,as has heretofore been done.

The process of constructing said bands is as follows: The bars of metalwhich I use are composed of 4tin and antimony, with a small proportionof copper, if the tin is of unusual softness, and are cast in pieces ofabout one-half the'length required for the finished band, and of atransverse section shown in fig. 5. .Any metallic composition possessingthe requisite ductility and softness may be `used as a material for thebands, but the component parts named form a durable band, which is.capable of receiving a line surface-polish during the process ofmanufacture, and retaining the same in subsequent use.

The standards H I-I support the journals F F G G of the twodrawing-rolls, the upper one of which has a vertical movement iu thesliding bearings N, which is controlled by the pressure-screws I I, thegeneral arrangement being the same as in ordinary drawing-rolls. Themale die D is formed upon the lower roll, and the outer edge has theoutline formed by the oblique linesff, connected by the curved line e,fig; 4 The female die is formed on the surface of the upper roll, and asection of its outline, z d 7L, corresponds in form and dimension withthe outline of the upper side of the completed band,lg. 2.

' To make the outer edges of the band perfect, and prevent anyprojection of the metal at the sides of the dies, the depth of thefemalevdie is increased, to allow the die D to enter it so far thatthevertical sides ofthe two dies come iu close contact, thus retaining themetal between the dies and shearing off any roughnessuf the edges,leaving them sharp and well defined.

The screws III being turned suiiciently to allow the bar of metal, iig.5, to enter between the dies, the bar is` repeatedly drawn throughbetween the revolving dies, the upper roll being gradually depressed bythe screws as the drawing, progresses. Under the pressure of the rolls,the length und density of the bar are continually increased, until itsshape corresponds, in -transverse section, to the space between the maleand female dies when the faces of the two rolls are brought in contact.The surfaces of the two dies are highly polished, and the nature of thecomposition of metalsemployed is such that a smooth and glitteringsurface is produced upon the band. The width of the bar, as east, islittle, if any, less than the width of the completed baud, to insure'filling the spaces between f and L with metal, and to secure a. perfectedge upon the projections a and a. Holes for fastening screws are Vthenformed in the -band through the plane surface c, and the 'band is readyfor use, and can be bent to conform to the curved outline of the backsof car-seats, and other like upholstering purposes? A band having theprojections a a upon its lower edges could not be formed by hand-laborfrom a cast bar of metal as perfectly as the same can be formed by theprocess of drawing, as described, and the cost of construction would beso great as to prevent the introduction and use of the hanl-made bandasanvarticle of manufacture. i I I When the bands are' fastened in place,the projections a a', at the. lower. edges of the band, will sink intothe plush, velvet, or other cloth' with which the seatis covered, andthe band, so formed as described, will possess the following advantagesover a band having a plane lower surface: The line of contact of theband and the cloth will be concealed, and anyI inequalities in the'meetingsur-faces of either will be less plainly seen, if visibleat all;the hand will have a firmer bearing, and be less likely to be displacedor bent up from its seat; the space which is usually seen between thebottoml of the common band and the edge of the seat will be closed, thusavoiding the collection of dust which gathers in the crevice at thatpoint, and is thence scattered out over the seat by the motion of thecars; and thecloth is held irmly anduniformly in place along the wholelength of the band, instead of being held only at the points of nailing,as in the common band.A

The shape of the lower edge of the projections a a may be varied,according to the nature of the cloth covering-to which vit is to beapplied, being angular, curved, or atte'ned at the point of contact withthe cloth.

What I claim as my invention, and desire to secure by Letters Patent, isA A metallic band, having the projections a afformed thereon,snbstantially as and for the purposelset forth.

Witness my hand, this 11th-day of September, A. D. 1867.

, i D. F. RANDALL.

Witnesses: y

JAPHnr GHAPIN, J. l. BUCKLAND.

